Pinmaps should not have contained GPIO_SPEED_xxx settings.
This is board dependent.
This change adds CONFIG_STM32H7_USE_LEGACY_PINMAP to allow for
lazy migration to using pinmaps without speeds.
The work required to do this can be aided by running tools/stm32_pinmap_tool.py.
The tools will take a board.h file and a legacy pinmap and outut the required
changes that one needs to make to a board.h file.
Eventually, STM32H7_USE_LEGACY_PINMAP will be deprecated and the legacy
pinmaps removed from NuttX.
Any new boards added should set STM32H7_USE_LEGACY_PINMAP=n and
fully define the pins in board.h
14a0e08386